ORIGINAL ARTICLE
An approach to the meso-scale epidemiological behavior of Plasmodiophora brassicae from cruciferous crops under tropical conditions
1
Universidad del Magdalena, Facultad de Ingeniería, Santa Marta, Colombia
2
Departamento de Agronomía, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia, Sede Bogotá, 111321, Bogotá, Colombia
3
Laboratorio de Agrocomputación y Análisis epidemiológico, Center of Excellence in Scientific Computing, Departamento de Agronomía, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia, sede Bogotá, Colombia
4
Plant Growth Facility Lead, Faculty of Agricultural, Life, and Environmental Sciences, 5-17 Ag/Forestry Building University of Alberta, Canada
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Submission date: 2024-06-20
Acceptance date: 2024-08-21
Online publication date: 2025-07-08
Corresponding author
Joaquín Guillermo Ramírez-Gil
Departamento de Agronomía, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia, Sede Bogotá, 111321, Bogotá, Colombia
Departamento de Agronomía, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia, Sede Bogotá, 111321, Bogotá, Colombia
Journal of Plant Protection Research 2025;65(2):255-269
HIGHLIGHTS
- Plasmodiophora brassicae causes clubroot disease.
- Plant/host interactions condition the pathology.
- Gaps in epidemiology limit IDM strategies.
- Meso-scale risk model based on edaphoclimatic factors.
KEYWORDS
TOPICS
ABSTRACT
Plasmodiophora brassicae is an obligate parasite and a natural soil inhabitant that
causes clubroot, a disease with significant economic impact in plants of the Brassicaceae
family. This pathology is conditioned by plant/host interactions, edaphoclimatic variables,
and mechanisms of inoculum dispersal. However, the epidemiology of this pathogen is not
well understood, thereby limiting its incorporation into integrated disease management
strategies (IDM). The objective of this work was to adjust a mesoscale risk and prognostic
model of P. brassicae based on edaphoclimatic factors and potential dispersal mechanisms
in brassica-producing areas in Colombia. The presence and inoculum density of the pathogen
were determined by visual inspection of symptoms and quantification by qPCR of soil
samples in a total of 127 plots located in regions with the highest production of species
from the Brassicaceae family. In addition, an edaphoclimatic characterization was carried
out based on field data and secondary information by web scraping using freely available
databases. The forecast models were determined by fitting a Generalized Linear Model
(GLM) using the logit and inverse link functions for binomial and gamma distributions,
respectively. The meso- and macroscale spatial risk model was developed under point pattern
approaches (Kernel density model and ecological niche model (ENM). The different
epidemiological analysis approaches used suggest that P. brassicae presents a high risk in
areas with host presence and conducive edaphoclimatic characteristics, indicating the need
to carry out epidemiological surveillance, reduce the dispersion of infested soil, and implement
P. brassicae exclusion methods.
RESPONSIBLE EDITOR
Mohamed Khan
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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